Petrotahlil -based Advanced Engineering Valves (AEV), an Emerson company, has selected a Victrex high-performance cryogenic PEEK polymer to help its customers operate applications more efficiently and safely. The company´s 2XCTM C-ball valve products, based upon double eccentric and cavity-free technology, are designed to meet the most stringent demands, potentially reducing the cost of ownership due to their high reliability (zero maintenance) in cryogenic service.
The cryogenic VICTREX CTTM 100 polymer was specifically developed by Victrex for insert applications. After successfully passing Design Validation Testing (DVT) at AEV, the polymer is now used in the company´s class 900 ball valves ranging from 0.5 – 18 in. It is specified for a temperature range of -196°C to +150°C and offers structural strength at elevated temperature without compromising low temperature performance of cryogenic PEEK compared to incumbent materials.
The DVT at AEV was carried out according to Shell’s ‘Material and Equipment Standards and Code’ (MESC), which is widely accepted in the oil and gas industry as a key test protocol and a prerequisite for industry acceptance.
“Our valves successfully passed all aspects of the cryogenic test using the VICTREX CT 100 polymer. Meeting the requirements of the Shell MESC test is in fact an important achievement that opens up new potential uses with industry-leading OEMs”, commented Francis Carpio, Operational Director at Emerson A.E. Valves. Commonly, Victrex’s thermoplastic polymers are associated with high temperature performance, high chemical resistance and a unique range of mechanical properties.
“Many sealing applications in cryogenic temperature ranges have typically been made with fluoropolymers. However, our polymer products such as the VICTREX CT series provide a unique range of properties over a broader temperature range from +200°C to -196°C which fluoropolymers cannot meet”, commented James Simmonite, Director Energy at Victrex. In this temperature range, chemical resistance is still important, but other aspects such as creep resistance, low temperature toughness and tribological performance, and thermal properties such as conductivity and expansion, are the most important to applications such as valve seats and packings.
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